Portable hand-lamp



H. M. KORETZKY AND I. FERTMAN.

PORTABLE HAND LAMP.

APPLICATION FILED AUG- 5, I919 Patented Jan. 18, 1921 UNITED STATES PAT ENr OFFICE.

' HARRY M. KORETZKY, 0F BROOKLYN, AND ISJEDOR, FEBTMAN, or NEwIYoRK, N. Y.

PORTABLE HAND-LAMP.

Application filed August 5, 1919. Serial No, 315,514.

To all whom it may concern? I Be it known that we, HARRY M. KoRu'rzKY and Isicoon'FnRTMAN, both citizens of the United States, residing at Brooklyn, Kings county,,State of New York, and at New York, Bronx county, State of New York, re-

spectively, have -invented certain-new and useful Improvements in Portable Hand- Lamps; and we do hereby declare the fol lowing to be a full, clear, and exact descrip.

tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in portable hand lamps of the kind in which an electric light is carried upon a cas-. ing which contains. the battery supplying current to the'light. I

One object of the invention is Specification of Letters Patent. Patented J an; 18, 1921.

to connect. the two batteries in series, as it makes electric contact withthe zinc endof the left hand battery and the carbon end of the right hand battery.

At the front of the casing, an insulating layer 16 is provided which carriesthe terminal '17,!naking contact with the zinc pole of the right hand battery, and also the ter'. minal 18 which makes contact with the car- '60 bon pole of the left hand battery. Both of these terminals are normally insulated from the casing 10.

At the front end of the casing 10 we prefer to place a supplementary casing 19, 65

' which contains and protects the reflector 20.

"to provide a novel form of portable lamp wherein two batteries side by side in .mutually inverted position are made available for lighting the light carried upon the. casing. object of the invention is to provide a novel and simple form of contact making device Another This reflector has an opening at the bottom into which is screwed-the usual form of in' candescent bulb 21, which projects through I an opening 22 into the battery casing- In 70- this position the external terminal of the lamp 21 is in electrical contact with the refiector 20, and the casings 19'af1'd 10,- while or switch for use in connection with the.

' .other features of my invention.

The invention is illustrated in a preferred form in the accompanying drawing, wherein Figure 1 is a vertical longitudinal section of our device, the batteries being shown in elevation, Fig. 2 is a plan view of the switch 'asseen from the outside, and Fig. 3 is a lonf gitudinal sectional view of the switch.

The casing 10 is preferably of metal and I is shaped so as conveniently to hold two 5 batteries 11 and 12v side by side, with'their usual external insulating .covering,.'as shown.

These batteries may consist of one or more cells apiece, and, as shown, aie placed in mutually inverted relation with respect to their polarities. The'car'bon end isupperand-battery and is lowermost in'the right hand-battery;

The'batteries are held place by a cap 13 carrying aspring 14 insulatedfrom. the cap'an The spring 14 not only holds the batteries onto the front end of the thecentral terminal of the lamp makes con'- tact with a spring extension on the 'termi-J nal 18. The central lamp terminal is therefore in electrical connection with the carbon pole of the combined batteries, through the spring 18. c a v a We prefer to secure the'refiector 20, together with the .usual lens- 23, by means of a metal rim 24 which can be screwed down supplemental casing 19, as shown.

'In order to light the lamp it is only necessary to connect the terminal 1'? electrically -with the outer or screw terminal of the lamp, and our broad invention covers'any means. for accomplishing this. In the pre-' fererd form shown, however, we employ a'90. switch or circuit-closer onthe side of the casing of the following character;

One end of themetal strip forming the terminal 17 is extended to project slightly through an-opening 25 in the side or edge of 'the'casing 10. Over this opening is placed .a protective plate or shell 26, within which casing by the layer l5yiofistrawb oard or other appropriate insulating material.

is "fixed a spring 27 having a button 28. WVhen this button ispressed, the spring 27 touches the extension of the terminal 17 (see Fig. '1) and brings said terminal into electric connection with the outer or screw terminal of the bulb 21 through the casings I finger upon the button 28, the contact-retaining means shown may bevused. For this purpose we provide a plate29 arranged to slide longitudinally upon the shell 26, and this'plate is provided with a sloping portion 30, which acts like a cam upon a bent up portion 3l'of the spring 27, when theplate 29 is pushed forward as shown in Fig. 1. As there shown, this results in pushing down the spring "to close circuit. Upon sliding the plate 29 back (as in Fig. 3) the circuit is opened, because the spring 27 acts normally to preserve-the open circuit position shown in Fig.' 3.- I

Various changes can be made in this device by those skilled in the are without departing from our invention, and we do not limit ourselves to "the details herein shown and described.

What we claim is In a portable electriclight, a metallic casing having an opening, an incandescent lamp bulb at one end thereof, two mutually inverted battery cells side by side within the casing, metallic terminals carried by and normally insulated from the casing at the two ends of the battery for connecting it in series with thela'mp, one of saidterminals having an extension leading to the opening in the casing, and a circuit-closing device on the casing adapted to connect said extension with the casing.

In testimony whereof, we afiix our signatures.

HARRY M. KORETZKY. I SEDOR FERTMAN. 

